Yep, they come apart very easily, just a phillips head and you're pretty much set to complete disassemble it. Most of the add one bits simply pop or pull off with a little effort, there is no black magic or sorcery needed.

Like Dave05 said, 6-8 easily accessable screws gets you inside the tank, a further 4 gets you into the turret. A couple for each circuit board, 6 for the gearboxes (all up). For larger mods the plastic is a little thicker (often double thickness) than Tamiya or similar "kit" tanks, which is nice because you have a little more "meat" to work with, strong surface for dremelling or mounting things. All-round I would say very easy to work on and customise